Cutter device



Nov. 6, 1934. T, M. LILLEBERG" 1,979,891

CUTTER DEVICE Filed April 2l, 1953 Zzvenzzmf is rection of the arrows;and

. e type and comprising a body portion presenting 'o The device alsocomprises a rotatable cutter eie- 5 it extends at the side of the pipeto be cut and Patented Nov. 6, 1934 A .n gi li. s, v 2"; s t u We? v FN?FMCE CUTTER DEVICE Tideinan M. Lilleberg, Chicago, iii., assigner to Nye'kool d: Machine Works, Chicago, lill., a corporation of illinoisApplication April 2l, 1933, Serial No. 667,277

' (ci. si-isaa 6 Claims.

ingshaft 9 or 12, as the case may be, and extending through the centralopening 19 in the cutter disk, one end of the tubular member 22 havingan enlargement 23 opposing a face of the cutter disk and containingT anannular recess 24 60l into Which the iiange on the disk 18, extends.

The support for the cutter disk also comprises a member 25 mounted onthe tubular member 22 to oppose the opposite face of the cutter disk 13and containing an annular recess 26 to receive the 65'3 flange 21 on thedisk 18.

The cutter disk 1S and the parts of the support therefor and abovedescribed are preferably rmly and rigidly secured together with theenlargement 23 of the member 22 and the member 7'0` 25 firmly clampedagainst the opposite faces of the cutter disk 13 beyond the flanges 20and 21 as shown. Any suitable means for this purpose may be provided,but by preference these parts are held together as stated by deflectingthe metal 7'5':- of one of the members forming the support intointerlocking relationship to the other of said members as for exampleand preferably as shown, namely, by reaming the outer end of the member25, as represented at 27, and swagingth'e gob adjacent end of thetubular member 22 into the space thus provided as represented at 28.

Referring to the modiication shown in Fig. 4. the cutter disk is of thesame construction as the disk 18 and is similarly indicated, the only85j diiference between these constructions being in the construction ofthe support for the cutter disk. Y

In the construction shown in Fig. 4 the support for the cutter disk isshown as formed of 90"; two sections 29 and 80, the section 29comprising a tubular portion 31 at which the support is adapted to berotatably supported, and an outer ange portion 32 at one end spaced fromthe portion 31 to provide an inwardly opening recess 95jv 33, and thesection comprising a tubular portion 34 telescoped with the tubularportion 31 and having at the end thereof opposite that at which theflange 32 is provided, an outer flange portion 35 spaced from thetubular portion 34 to 100 pro'vide an inwardly opening recess 36.

My invention relates more particularly to the cutter velements ofcutterdevices, as for example and especially so-called pipe cutters forcutting 01T metalpipe; and my primary object is to provide improvementsin such devices to the end of reducing the cost of manufacture thereof.

Referring to the accompanying drawing:

Figure 1 is a view in side elevation of a cutter device having cutterelements constructed in accordance with my invention.

` Figure 2 is an end view of similar cutter elements.

` Figure 3 is a sectional View taken at the irregular line 3 3 on Fig. 2and viewed in the di- Figure 4, a view like Fig. 3 of a modification ofthe ucutter element.

I have chosen to illustrate my invention as embodied in a so-called pipecutter of a well known at one end a tubular extension 6 internallythreaded, and at its opposite end a lateral extenu sion 'l containingrecesses 8.

Extending into the recesses 8 and journalled on shafts 9 mounted in theside walls of these recesses are rotary cutter elements 10 constructedin accordance with my invention and located at opposite sides of thelongitudinal axis of the extension 6.

ment 11, also embodying my invention, mounted ona shaft 12 in a recess13 in a block 14 pivotally mounted on the body portion 5, the mountingof the cutter element 11 being such, as shown, that represented at 15opposite that at which the cutter elements 10 extend.

Pressure is applied for producing the cutting of the pipe by the cutters10 and 11 by a rotatable shaft 16 mounted at its threaded portion 17 inthe thread of the tubular extension 6, the inner end of the shaftlbearing against an end of the block 14.

The cutter elements 10 and 11 which are alike in construction, eachcomprise, according to the showing in Fig. 3, a relatively thin cutterdisk 18 of metal adapted to be tempered, centrally apertured asrepresented at 19 and hanged at the opening 19 at the opposite faces ofthe disk 18, as represented at 20 and 21, respectively, to provide arelatively broad annular bearing surface at which to support the disk.

The support for the cutter disk and which forms `a bushing thereforcomprises a tubular member 22 provided for journal mounting on thesupport- The cutter disk 18 surrounds the tubular structure formed ofthe portions 3'1 and 34 and is engaged at its opposite faces by theadjacent ends of the flanges 32 and 35 preferably in 105 suitable way,as for example and preferably by swaging the metal of the tubularportion 31 outwardly as represented at 37, into interlocking relationwith the adjacent receding edge 38 of the section 30.

AS will be understood from the foregoing, the

`provision of the broad bearing surface provided on the cutter disk atthe opening therein permits of the forming of the disk-support ofrelatively soft metal with no heat treatment required and without dangerof the cutting of the cutter 4disk into the portion of the support onwhich this disk is mounted, the construction shown in Fig. 3 permittingof the forming of the disk support of relatively soft metal, as forexample low carbon steel, on a screw machine, and the con- -structionshown in Fig. 4 permitting the sections to be formed from relativelysoft sheet metal strips on a punch press.

The provision of portions of the disk support at opposite faces of thecutter disk beyond the flanges 20 and 2l of the latter serve as abacking for the cutter disk holding the latter against distortion andthus permitting of the provision of the cutter disk as a relatively thinmember.

While I have illustrated and described certain particular constructionsconstituting embodiments of my invention, I do not wish to be understoodas intending to limit it thereto as the same may be variously modifiedand altered and the invention embodied in other forms of structure,without departing from the spirit of my invention.

What I claim as new and desire to secure by Letters Patent, is:

1. A cutter device comprising a thin cutter disk containing an opening,said disk comprising a face portion and a flanged portion, said flangedportion being disposed about said opening to provide an extended bearingsurface, and a sectional support for said disk having an aperturedportion extending through the opening in said disk and portions disposedat opposite faces of said disk and extending outwardly beyond the planeof said flanged portion, said support containing a recess to receivesaid fianged portion.

2. A cutter device comprising an apertured support having acircumferential channel in its periphery and an overhanging part aboutsaid channel, and a thin cutter disk rotatable with the support havingan opening, the material of said disk being thickened to form anextended` bearing surface, said thickened portion seating in saidchannel.

3. A cutter device comprising a thin cutter disk having an opening, atubular support initially separate from the disk, said tubular supportbeing rotatable with the disk and extending through said opening, and anenlargement on the exterior of said support integral therewith againstwhich one side of the disk abuts at a distance outwardly of saidopening, and an annular member opposed to said enlargement telescopedover and fastened to said support and abutting the side of the diskopposite the said enlargement, said disk being thickened about saidopening to increase the area of contact of the disk with said support,said enlargement and annular member being spaced from the sides of thedisk between said opening and their zones of abutment with the disk.

4. A cutter device comprising a cutter disk having an opening, a supporttherefor initially separate therefrom, said support being rotatable withsaid disk and comprising sections having tubular portions in telescopedrelation, said tubular portions passing through said opening and theouter tubular portion seating said disk, and inwardly extending tubularportions rigid with and of greater diameter than the first mentionedtubular portions, said inwardly extending tubular portions engagingopposite sides of the disk in spaced relation to the first mentionedportions.

5. A cutter device comprising a cutter disk having an opening, anapertured support of soft metal rotatable with the disk and passingthrough said opening, said disk throughout the major portion thereofbeing of a thickness liable to cut into the support in the use of thedevice, and said disk about said opening being thickened to extend thatsurface of the disk in bearing engagement with said support to preventcutting of the latter by the disk.

6. A cutter device comprising a cutter disk having an opening, anapertured support of low carbon steel rotatable with the disk andpassing through said opening, said disk throughout the major portionthereof being of a thickness liable to out into the support in the useof the device, and said disk about said opening being thickened toextend that surface of the disk in bearing engagement with said supportto prevent cutting of the latter by the disk.

TIDEMAN M. LILLEBERG.

